Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:44:33 2012 Optimize a model with 1 rows, 177 columns and 177 nonzeros Model has 155 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 156 rows, 305 columns, 615 nonzeros Variable types: 0 continuous, 305 integer (304 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 0.000000e+00, 185 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 50 45.00000 0.00000 100% - 0s 0 0 0.00000 0 21 45.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s 0 0 0.00000 0 17 14.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 23 11.00000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s 0 0 0.00000 0 15 11.00000 0.00000 100% - 0s 0 0 0.00000 0 17 11.00000 0.00000 100% - 0s 0 0 0.00000 0 22 11.00000 0.00000 100% - 0s 0 0 0.00000 0 28 11.00000 0.00000 100% - 0s 0 0 0.00000 0 28 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 2 0.00000 0 18 10.00000 0.00000 100% - 0s H 54 34 9.0000000 0.00000 100% 2.0 0s H 507 247 8.0000000 0.00000 100% 7.1 0s * 516 190 24 7.0000000 0.00000 100% 7.0 0s H 552 148 6.0000000 0.00000 100% 7.3 0s H 562 127 5.0000000 0.00000 100% 7.6 0s * 755 0 15 4.0000000 4.00000 0.0% 22.3 0s Cutting planes: Cover: 282 Explored 756 nodes (17467 simplex iterations) in 0.34 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%